The main function of the instrument is managing excess liquidity in individual bank and/or in the banking system in the short term, where banks may place funds in a deposit with the NBRM at their initiative. The maturity of the deposits is overnight and seven days. The interest rate on the overnight deposit is the threshold of short-term interest rates on the money market and equals 0,25%. Banks may place funds in overnight deposit with the NBRM every day. The interest rates on the seven-day deposit is 0,5%, and banks may place funds with the NBRM once a week, on Wednesday.